Chime-whistle.



P. PARIZEK. CHIME WHISTLE.

APPLICATION FILED DBO. 21 1908.

Patented Oct. 5, 1909.

UNITED STATES PATENT OFFICE.

FRANK PARIZEK, OF CHICAGO, ILLINOIS, ASSIGNOR TO QUINCY BRASS WORKS, OF CHICAGO, ILLINOIS, .A CORPORATION OF ILLINOIS.

CHINE-WHISTLE.

Specification of Letters Patent.

Patented Oct. 5, 1909.

T 0 all whom it may concern:

Be it known that I, F RANK PARIZEK, a citizen of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Chime-Whistles, of which the following is a specification.

My invention relates to improvements in chime whistles and has for its object to provide a device of this character which shall present a neat appearance and be particularly compact in form, and at the same time be able to produce the same tone as much larger horns in general use.

A further object of my invention is to use the dead space in a horn which ordinarily performs no useful function.

Other objects will appear hereinafter.

With these objects in View, my invention consists in such a novel construction and arrangement of parts all as will be hereinafter fully set forth and more particularly pointed out in the appended claim.

My invention will be more readily understood by reference to the accompanying drawings forming a part of this specification, and in which- Figure 1 is a side elevation of my improved signal horn in its preferred form. Fig. 2 is a side elevation of the whistle with the outside shell removed. Fig. 3 is a detail transverse section taken on line 00-m of Fig. 2.

Referring to the drawings, 1 indicates a tubular shell or casing, and 2 a core fitting snugly within the casing. The core 2 is cross-shaped in transverse section for a considerable distance, the four branches 3, 4, 6 and 8 dividing this portion of the casing 1 into four similar tone chambers. At some distance from the whistle end of the core, the wall 4 terminates in a partition wall 5 closing the end of the chamber included by the walls 3, 4 and 5. The walls 3 and 6 extend continuously to the end piece 7 of the core, so that the tone chamber included by the walls 4 and 6, enlarges greatly at its end and takes in the space included between walls 5, 7, 6 and 3. Similarly wall 8 terminates in a partition wall 9 forming a straight chamber including walls 3, 8 and 9 and a chamber with an enlarged end included by walls 8, 6, 9 and 7. The juncture between walls 4: and 8 and walls 5 and 9 is rounded on the inside and out so as not to introduce interfering vibrations in the tone chambers. The end piece 7 is integral with walls 3 and 6 and serves to reinforce them besides serving as the end piece of the whistle. An annular shoulder 10 and a pcripheral surface 11 are provided on end piece 7 the former serving as a stop to prevent removal of the casing l and the latter forming a tight fitting bearing and support for the end of the casing. The head portion of the horn 12 is of theusual construction, the same being tapped to screw onto the core 2 and the intake pipe (not shown). By this construction it will be seen that the oppositely disposed walls 3 and 6 form in eifect a continuous web extending the full length of shell 1 and serving to support it throughout its length as well as furnish a rigid support for end piece 7; that the oppositely disposed walls 4: and 8 terminate in walls 5 and 9, havin rounded junctions therewith; that the effect of this arrangement is to form continuous chambers with no projections or recessesof any kind to interfere with the vibrations in the tone chambers while at the same time the entire interior available space is utilized for tone chambers, and that a compact, rigid and neat appearing whistle is produced.

Having described my invention what I claim as new and desire to secure by Letters Patent is;

In a chime whistle, the combination of core 2, comprising oppositely disposed walls 3 and 6 constituting a continuous web; end wall 7 integral with said web and provided with annular shoulder 10 and peripheral surface 11; and oppositely disposed walls 4: and 8 terminating in walls 5 and 9 through rounded junctions and at different distances from the whistle end, with the shell 1 snugly fitting over core 2 and surface 11 and abutting against shoulder 10, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK PARIZEK.

Witnesses:

JOSHUA R. H. Porrs, HELEN F. LiLLIs. 

